Does anybody know, with any confidence, what memory model is provided
by Pentium processors?
Here is what I've heard, but not with confidence:
* The Pentium implements a TSO memory model; writes can be reordered with
following reads, but no other reorders are possible.
* The Pentium doesn't offer a memory barrier instruction. The only
instruction
that has the effect of a memory barrier is the processor ID instruction,
which looks like it might be expensive.
Does anyone have any better information?
Bill Pugh
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